【Java基礎】Java開發過程中的常用工具類庫

Java開發過程中的常用工具類庫 [TOC] Apache Commons類庫 Apache Commons是一個非常有用的工具包，為解決各種實際的問題提供了通用現成的代碼，不需要我們程式員再重覆造輪子。關於這個類庫的詳細介紹可以訪問 "官網介紹" 。下麵表格列出了部分的工具包。我們平時開發過程中可 ...

Java開發過程中的常用工具類庫

Java開發過程中的常用工具類庫

Apache Commons類庫

Apache Commons是一個非常有用的工具包，為解決各種實際的問題提供了通用現成的代碼，不需要我們程式員再重覆造輪子。關於這個類庫的詳細介紹可以訪問官網介紹。下麵表格列出了部分的工具包。我們平時開發過程中可以根據自己的需要挑選合適的工具包。

Components	Description	Latest Version	Released
BCEL	Byte Code Engineering Library - analyze, create, and manipulate Java class files	6.3.1	2019/3/24
BeanUtils	Easy-to-use wrappers around the Java reflection and introspection APIs.	1.9.3	2016/9/26
BSF	Bean Scripting Framework - interface to scripting languages, including JSR-223	3.1	2010/6/24
Chain	Chain of Responsibility pattern implemention.	1.2	2008/6/2
CLI	Command Line arguments parser.	1.4	2017/3/9
Codec	General encoding/decoding algorithms (for example phonetic, base64, URL).	1.12	2019/2/16
Collections	Extends or augments the Java Collections Framework.	4.3	2019/2/5
Compress	Defines an API for working with tar, zip and bzip2 files.	1.18	2018/8/16
Configuration	Reading of configuration/preferences files in various formats.	2.4	2018/10/29
Crypto	A cryptographic library optimized with AES-NI wrapping Openssl or JCE algorithm implementations.	1.0.0	2016/7/22
CSV	Component for reading and writing comma separated value files.	1.6	2018/9/25
Daemon	Alternative invocation mechanism for unix-daemon-like java code.	1.0.15	2013/4/3
DBCP	Database connection pooling services.	2.6.0	2019/2/19
DbUtils	JDBC helper library.	1.7	2017/7/20
Digester	XML-to-Java-object mapping utility.	3.2	2011/12/13
Email	Library for sending e-mail from Java.	1.5	2017/8/1
Exec	API for dealing with external process execution and environment management in Java.	1.3	2014/11/6
FileUpload	File upload capability for your servlets and web applications.	1.4	2019/1/16
Functor	A functor is a function that can be manipulated as an object, or an object representing a single, generic function.	1	2011-??-??
Geometry	Space and coordinates.	1	2018-??-??
Imaging (previously called Sanselan)	A pure-Java image library.	0.97-incubator	2009/2/20
IO	Collection of I/O utilities.	2.6	2017/10/15
JCI	Java Compiler Interface	1.1	2013/10/14
JCS	Java Caching System	2.2,1	2018/8/23
Jelly	XML based scripting and processing engine.	1.0.1	2017/9/27
Jexl	Expression language which extends the Expression Language of the JSTL.	3.1	2017/4/14
JXPath	Utilities for manipulating Java Beans using the XPath syntax.	1.3	2008/8/14
Lang	Provides extra functionality for classes in java.lang.	3.9	2019/4/15
Logging	Wrapper around a variety of logging API implementations.	1.2	2014/7/11
Math	Lightweight, self-contained mathematics and statistics components.	3.5	2015/4/17
Net	Collection of network utilities and protocol implementations.	3.6	2017/2/15
Numbers	Number types (complex, quaternion, fraction) and utilities (arrays, combinatorics).	1	2017-??-??
OGNL	An Object-Graph Navigation Language	4	2013-??-??
Pool	Generic object pooling component.	2.6.2	2019/4/11
Proxy	Library for creating dynamic proxies.	1	2008/2/28
RDF	Common implementation of RDF 1.1 that could be implemented by systems on the JVM.	0.3.0-incubating	2016/11/15
RNG	Implementations of random numbers generators.	1.2	2018/12/12
SCXML	An implementation of the State Chart XML specification aimed at creating and maintaining a Java SCXML engine.It is capable of executing a state machine defined using a SCXML document, and abstracts out the environment interfaces.	0.9	2008/12/1
Statistics	Statistics.	0.1	????-??-??
Text	Apache Commons Text is a library focused on algorithms working on strings.	1.6	2018/10/16
Validator	Framework to define validators and validation rules in an xml file.	1.6	2017/2/21
VFS	Virtual File System component for treating files, FTP, SMB, ZIP and such like as a single logical file system.	2.3	2019/2/4
Weaver	Provides an easy way to enhance (weave) compiled bytecode.	2	2018/9/7

除了上面表格中的工具包，Apache Common項目還包括以下幾個工具包，其中的http-client是我們平時非常常用的。

Cactus: Cactus is a simple test framework for unit testing server-side java code (Servlets, EJBs, Tag Libs, Filters, ...). The intent of Cactus is to lower the cost of writing tests for server-side code.
HiveMind: HiveMind is a services and configuration microkernel. HiveMind allows you to create your application using a service oriented architecture.
HttpClient 3.x: Framework for working with the client-side of the HTTP protocol.
Naming: The Naming subproject will contain common JNDI code along with various JNDI providers.

Guava類庫

Guava工程包含了若幹被Google的 Java項目廣泛依賴的核心庫，例如：集合 [collections] 、緩存 [caching] 、原生類型支持 [primitives support] 、併發庫 [concurrency libraries] 、通用註解 [common annotations] 、字元串處理 [string processing] 、I/O 等等。下麵列出Guava工具包中的常用功能點，以便需要的時候查閱使用。